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Finding the Fourth Proportional to 710,305.34, 980,157.02 and 400,258.40

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Solution

The fourth proportional to 710,305.34, 980,157.02 and 400,258.40 is: 552,320.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,305.34 : 980,157.02 = 400,258.40 : x
  2. Step 2: Convert to fraction form
    710,305.34/980,157.02 = 400,258.40/x
  3. Step 3: Cross multiply
    710,305.34x = 980,157.02 × 400,258.40
  4. Step 4: Simplify right side
    710,305.34x = 392,316,073,671.89
  5. Step 5: Solve for x
    x = 392,316,073,671.89/710,305.34
  6. Step 6: Final answer
    x = 552,320.33

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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.