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Finding the Fourth Proportional to 665,673.40, 998,510.10 and 553,480.30

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Solution

The fourth proportional to 665,673.40, 998,510.10 and 553,480.30 is: 830,220.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,673.40 : 998,510.10 = 553,480.30 : x
  2. Step 2: Convert to fraction form
    665,673.40/998,510.10 = 553,480.30/x
  3. Step 3: Cross multiply
    665,673.40x = 998,510.10 × 553,480.30
  4. Step 4: Simplify right side
    665,673.40x = 552,655,669,701.03
  5. Step 5: Solve for x
    x = 552,655,669,701.03/665,673.40
  6. Step 6: Final answer
    x = 830,220.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.