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Finding the Fourth Proportional to 692,088, 955,139.76 and 390,340.32

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Solution

The fourth proportional to 692,088, 955,139.76 and 390,340.32 is: 538,702.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,088 : 955,139.76 = 390,340.32 : x
  2. Step 2: Convert to fraction form
    692,088/955,139.76 = 390,340.32/x
  3. Step 3: Cross multiply
    692,088x = 955,139.76 × 390,340.32
  4. Step 4: Simplify right side
    692,088x = 372,829,559,563.12
  5. Step 5: Solve for x
    x = 372,829,559,563.12/692,088
  6. Step 6: Final answer
    x = 538,702.53

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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.