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Finding the Fourth Proportional to 692,291.52, 955,406.88 and 390,479.04

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Solution

The fourth proportional to 692,291.52, 955,406.88 and 390,479.04 is: 538,886.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,291.52 : 955,406.88 = 390,479.04 : x
  2. Step 2: Convert to fraction form
    692,291.52/955,406.88 = 390,479.04/x
  3. Step 3: Cross multiply
    692,291.52x = 955,406.88 × 390,479.04
  4. Step 4: Simplify right side
    692,291.52x = 373,066,361,311.80
  5. Step 5: Solve for x
    x = 373,066,361,311.80/692,291.52
  6. Step 6: Final answer
    x = 538,886.22

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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.