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Finding the Fourth Proportional to 692,406.47, 955,518.56 and 386,480.20

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Solution

The fourth proportional to 692,406.47, 955,518.56 and 386,480.20 is: 533,341.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,406.47 : 955,518.56 = 386,480.20 : x
  2. Step 2: Convert to fraction form
    692,406.47/955,518.56 = 386,480.20/x
  3. Step 3: Cross multiply
    692,406.47x = 955,518.56 × 386,480.20
  4. Step 4: Simplify right side
    692,406.47x = 369,288,999,851.32
  5. Step 5: Solve for x
    x = 369,288,999,851.32/692,406.47
  6. Step 6: Final answer
    x = 533,341.35

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Double scale
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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.