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Finding the Fourth Proportional to 423,095.40, 634,643.10 and 255,133.80

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Solution

The fourth proportional to 423,095.40, 634,643.10 and 255,133.80 is: 382,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,095.40 : 634,643.10 = 255,133.80 : x
  2. Step 2: Convert to fraction form
    423,095.40/634,643.10 = 255,133.80/x
  3. Step 3: Cross multiply
    423,095.40x = 634,643.10 × 255,133.80
  4. Step 4: Simplify right side
    423,095.40x = 161,918,905,746.78
  5. Step 5: Solve for x
    x = 161,918,905,746.78/423,095.40
  6. Step 6: Final answer
    x = 382,700.70

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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.