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Finding the Fourth Proportional to 530,831.40, 794,303.10 and 390,863.40

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Solution

The fourth proportional to 530,831.40, 794,303.10 and 390,863.40 is: 584,863.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,831.40 : 794,303.10 = 390,863.40 : x
  2. Step 2: Convert to fraction form
    530,831.40/794,303.10 = 390,863.40/x
  3. Step 3: Cross multiply
    530,831.40x = 794,303.10 × 390,863.40
  4. Step 4: Simplify right side
    530,831.40x = 310,464,010,296.54
  5. Step 5: Solve for x
    x = 310,464,010,296.54/530,831.40
  6. Step 6: Final answer
    x = 584,863.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.