Home / 717,386.95-990,038.75-395,096.96

Finding the Fourth Proportional to 717,386.95, 990,038.75 and 395,096.96

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Solution

The fourth proportional to 717,386.95, 990,038.75 and 395,096.96 is: 545,258.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,386.95 : 990,038.75 = 395,096.96 : x
  2. Step 2: Convert to fraction form
    717,386.95/990,038.75 = 395,096.96/x
  3. Step 3: Cross multiply
    717,386.95x = 990,038.75 × 395,096.96
  4. Step 4: Simplify right side
    717,386.95x = 391,161,300,407.20
  5. Step 5: Solve for x
    x = 391,161,300,407.20/717,386.95
  6. Step 6: Final answer
    x = 545,258.46

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.