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Finding the Fourth Proportional to 746.76, 1,030.53 and 415.20

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Solution

The fourth proportional to 746.76, 1,030.53 and 415.20 is: 572.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.76 : 1,030.53 = 415.20 : x
  2. Step 2: Convert to fraction form
    746.76/1,030.53 = 415.20/x
  3. Step 3: Cross multiply
    746.76x = 1,030.53 × 415.20
  4. Step 4: Simplify right side
    746.76x = 427,876.06
  5. Step 5: Solve for x
    x = 427,876.06/746.76
  6. Step 6: Final answer
    x = 572.98

Related Problems

Find fourth proportional to 373.38, 515.27 and 207.60
Half scale
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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.