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Finding the Fourth Proportional to 642,712.40, 964,068.60 and 169,445.60

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Solution

The fourth proportional to 642,712.40, 964,068.60 and 169,445.60 is: 254,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,712.40 : 964,068.60 = 169,445.60 : x
  2. Step 2: Convert to fraction form
    642,712.40/964,068.60 = 169,445.60/x
  3. Step 3: Cross multiply
    642,712.40x = 964,068.60 × 169,445.60
  4. Step 4: Simplify right side
    642,712.40x = 163,357,182,368.16
  5. Step 5: Solve for x
    x = 163,357,182,368.16/642,712.40
  6. Step 6: Final answer
    x = 254,168.40

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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.