Home / 478,826.73-660,663.40-315,465.12

Finding the Fourth Proportional to 478,826.73, 660,663.40 and 315,465.12

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Solution

The fourth proportional to 478,826.73, 660,663.40 and 315,465.12 is: 435,264.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,826.73 : 660,663.40 = 315,465.12 : x
  2. Step 2: Convert to fraction form
    478,826.73/660,663.40 = 315,465.12/x
  3. Step 3: Cross multiply
    478,826.73x = 660,663.40 × 315,465.12
  4. Step 4: Simplify right side
    478,826.73x = 208,416,258,078.01
  5. Step 5: Solve for x
    x = 208,416,258,078.01/478,826.73
  6. Step 6: Final answer
    x = 435,264.46

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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.